Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Coiba National Park and its Special Zone of Marine Protection' has mentioned 'Prison' in the following places:
Occurrence Sentence Text Source
In 1919 a penal colony was built on the island and during the years that Panama was under the dictatorships of Omar Torrijos and Manuel Noriega, the prison on Coiba was a feared place with a reputation for brutal conditions, extreme tortures, executions and political murder.
Nobody knows exactly how many people were killed in the prison during this period, but sources claim that the number could be close to three hundred.
As such, the island was avoided by locals, and other than the prison, was completely undeveloped.
After the prison was closed down in 2004, the island's pristine condition made it ideal as a reserve.
It is now said that the prison is haunted by the ghosts of prisoners.